Answer
$2x^2+xy-21y^2$
Work Step by Step
I use the FOIL method:
$(x-3y)(2x+7y)=2x^2+7xy-6xy-21y^2=2x^2+xy-21y^2$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 5 - Section 5.2 - Multiplication of Polynomials - Exercise Set - Page 338: 45
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